Name the pending CommonMark divergences and complete the spec attribution

README.md

@@ -115,6 +115,11 @@ emit refuses:
   library's canonical spelling, which round-trips byte-identically — where it converts back at
   all: a parse succeeding is no promise of that, so keep the source until the way back succeeds.
   `[a](/a\b)`, `<http://x?a=1&amp;b=2>` and `[a](/x&#10;y)` read cleanly and then refuse.
+- Three CommonMark spellings parse without an error and build a document the reference renders
+  differently: `[](/url)` and `[]()` stay literal text against CommonMark's empty link, a list
+  continuing past a marker change stays one list against CommonMark's two, and a shortcut
+  reference matching its definition only under Unicode case folding stays unresolved. Each is
+  pinned `pending` in `corpus/commonmark-spec/exceptions.json`.
 - Raw HTML in markdown input is an error result, never a silent drop — a tag, a comment and a
   processing instruction alike. ADF holds no raw-HTML node; the element mapping ships at `0.3.0`.
 - Not every document converts back: `adfToMarkdown` is partial on valid ADF — a text node holding

corpus/README.md

@@ -20,5 +20,7 @@ One directory per contract kind, each landing with its milestone:
   milestone may close).
 
 JSON is editor-normal (AGENTS.md §2), two-space indent, keys sorted. `spec.json` is the vendored,
-upstream machine-readable suite, byte-exact (CommonMark 0.31.2, CC-BY-SA-4.0, © John MacFarlane),
-and is not re-serialized by the corpus gate.
+upstream machine-readable suite, byte-exact from
+[spec.commonmark.org](https://spec.commonmark.org/0.31.2/spec.json) (CommonMark 0.31.2, © John
+MacFarlane, [CC-BY-SA-4.0](https://creativecommons.org/licenses/by-sa/4.0/)), and is not
+re-serialized by the corpus gate.